Evidence of a Coulomb-Interaction-Induced Lifshitz Transition and Robust Hybrid Weyl Semimetal in T-d-MoTe2

作者:Xu, N (Xu, N.)^{[ 1 ]} ; Wang, ZW (Wang, Z. W.)^{[ 2 ]} ; Magrez, A (Magrez, A.)^{[ 3 ]} ; Bugnon, P (Bugnon, P.)^{[ 3 ]} ; Berger, H (Berger, H.)^{[ 3 ]} ; Matt, CE (Matt, C. E.)^{[ 4,5 ]}; Strocov, VN (Strocov, V. N.)^{[ 4 ]} ; Plumb, NC (Plumb, N. C.)^{[ 4 ]} ; Radovic, M (Radovic, M.)^{[ 4 ]} ; Pomjakushina, E (Pomjakushina, E.)^{[ 6 ]} ...更多内容

PHYSICAL REVIEW LETTERS

卷: 121

期: 13

文献号: 136401

DOI: 10.1103/PhysRevLett.121.136401

出版年: SEP 25 2018

文献类型:Article

摘要

Using soft x-ray angle-resolved photoemission spectroscopy we probed the bulk electronic structure of T-d-MoTe2. We found that on-site Coulomb interaction leads to a Lifshitz transition, which is essential for a precise description of the electronic structure. A hybrid Weyl semimetal state with a pair ofenergy bands touching at both type-I and type-II Weyl nodes is indicated by comparing the experimental data with theoretical calculations. Unveiling the importance of Coulomb interaction opens up a new route to comprehend the unique properties of MoTe2, and is significant for understanding the interplay between correlation effects, strong spin-orbit coupling and superconductivity in this van der Waals material.

作者信息

通讯作者地址: Xu, N (通讯作者)

Wuhan Univ, Inst Adv Studies, Wuhan 430072, Hubei, Peoples R China.

通讯作者地址: Shi, M (通讯作者)

Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.

通讯作者地址: Ding, H (通讯作者)

Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.

通讯作者地址: Ding, H (通讯作者)

Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.

通讯作者地址: Ding, H (通讯作者)

Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China.

电子邮件地址:nxu@whu.edu.cn; dingh@iphy.ac.cn; ming.shi@psi.ch

原文PDF链接：

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.136401